AS1281 154.45.248.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.45.248.0/24154.45.249.0/24154.45.250.0/24154.45.251.0/24154.45.252.0/24154.45.253.0/24154.45.254.0/24154.45.255.0/24